Machine for the manufacture of shaperetaining pressings, in particular pads



June 14, 1960 wnEs 2,940,131

MACHINE FOR THE MANUFACTURE OF SHAPE-RETAINING PRESSINGS, IN PARTICULAR PADS Filed Feb. 21, 1956 I 2 m h H limited States Fatent a MACI HNE FOR THE MANUFACTURE OF SHAPE.- RETAINING PRESSINGS, IN PARTICULAR PADS Friedrich Wieser, Vienna, Austria, assignor to Hytakos Aktiengesellschaft, Zug, Switzerland, .1 company of Switzerland I Filed Feb. 21, 1956, Set. No.'5 ,67,025

Claims priority, application Switzerland June 23, 1955 9 Claims. c1. lea-144.5)

The present invention relate to a m chine for the manufacture of shape-retaining cotton-wool pressings from a roll, in particular for the production of pads. Various machines of the type are known but the majority displays the disadvantage that their output is low.

In order to obtain a large output from such a machine, it is, according to this invention, suggested that several plier-type clamping jaws controlled by a cam and radially displaceable press dies designed to press the heated rolls are arranged along the circumference of a rotary tool holding plate. Such an arrangement enables the heated rolls to be supplied to the press in rapid sequence and the rolls to be moulded into the desired shape and subsequently ejected while the press is in rotation.

In the practical embodiment the press dies carrying a control roller and the swivelling clamping jaws between the tool holder plate and a carrier ring connected, by way of example, by means of the pivot pin, are movably arranged. The pivot pins of the clamping jaws are provided with a lever arm carrying a guide roller for a cam which is arranged below the tool holder plate on the machine housing. This provides a very simple and reliable control means for the clamping jaws.

The control roller and its associated cam for the press dies are conical so that an alteration of the press die stroke will be caused by an axial displacement of the cam face. The press dies are returned by a separate return roller controlled by a cam ring.

An embodiment of a press according to this invention is shown in the attached drawing in which:

Fig. l is a fragmentary vertical section of the machine,

Fig. 2 is a horizontal section taken along line ll'II of Fig. 1,

Fig. 3 is a vertical section along line 111-411 in Fig. 1, and

Fig. 4 is a section taken along line lVlV in Fig. 1.

Arranged on the baseplate 1 is the machine housing 2 which is at its centre equipped with a guide housing 3 for the driving shaft 4 held in ball bearings 5 and 6. The shaft 4 has its lower end provided with a gear 7 which is rotated, by way of example, by a chain drive (not shown). The other end of the driving shaft 4 carries a head member 8 holding the tool holder plate 9. Below this tool holder plate is the carrier ring 10 which is carried, by way of example, by the pivot pins 11 of the clamping jaws 12.

The pivot pins 11 of the clamping jaws carry a lever arm 13 (Fig. 3) below the carrier ring 10, which lever is provided with a guide roller 14 for the cam 15. The cam 15 is seated and fixed in a horizontal portion 42 of the housing 2 as can be best seen in Fig. 1. When the tool holder plate rotates, the guide rollers 14 glide in the cam 15 and thereby control the clamping jaws.

Arranged in the interior of the machine is a ring 16 which is designed to support a cam. Above the ring is provided a cam guide 17 for a control roller 18 arranged at the end of a press die 19. A portion of the surface of cam 17 engages roller 18 for displacing the dies 19 outifi iiijfil Patented June 14], 1960 2 V wardly, while at other times the cam provides a guide for maintaining the dies 19 in desired position. In addition, a return cam 20 is provided which acts on a roller 21 so that the press die is forced outward by the cam 17 and retracted inward by the roller 21,. H

The rolls 30 to be pressed are forced into themachine at one station while the clamping jaws 12 are open; on further rotation, the clamping jaws 12 first close as appears from Fig. 2. Subsequently the press die 19 is fo ced outwards so that the roll is completely compressed into a circular pressing. The shape desired is obtained by the design of the clamping jaws and the front end of the press die. The pressings then remain in this compressed position during a further rotation so that they will retain their shape after being ejected later. This ejection, as shown in Fig. 2 as well, is effected by a further outward advance of the press die 19, the clamping jaws 12 being then open again.

For the purpose of adjusting the stroke of the press dies 19 the cam disc 17 and the control roller 18 are conical. The cam 17 can be adjusted for height via a bush 31. To this end, a manually actuated control shaft 22 is arranged which rotates a rim having a trapezoidal thread 25 via bevel gears 23 and 24 so that the bush 31 is adjusted for height.

The press dies 19 can, by way of example, be held by guides 19:: (Fig. 4) which are screwed to the underside of the tool holder plate 9. The height of these press dies and accordingly the space between the tool holder plate 9 and the carrier ring 10 substantially corresponds to the length of the pressing to be produced.

The rolls 38 inserted into the machine either by hand or automatically by means of a turntable, forming no part of the present invention, which is located adjacent to carrier ring 10 are heated in the known manner in order to improve their shape retention. In order to prevent the pressings from cooling too much during pressing, the machine housing 2 and the cover 29 arranged above the tool holder plate 9 are equipped with insulating layers 26 and 27. The pressed rolls may, of course, be removed by hand or may gently fall down a chute of conventional construction and forming no part of the present invention. Alternatively, a pickup table may be employed.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is: a

1. A machine for manufacturing a tampon-shaped pad and like article; comprising a rotatable drive shaft, a holder operatively connected with said shaft for rotation therewith, a carrier spaced from said holder and operatively connected for rotation with the latter, pairs of forming jaws shaped for engagement with each other at respective ends thereof, pairs of spaced pivot pins extending from said holder to said carrier and arranged for receiving respective forming jaws, so that said forming jaws may be spaced apart from each other and brought into engagement with each other, press die means disposed for reciprocable movement within the space between adjacent pivot pins and beyond the respective adjacent pivot pins and said forming jaws, first means for controlling said reciprocable movement of said press die means and for displacing the latter in predetermined sequence to each other, and second means for controlling the movement of said forming jaws from a position, in which said forming jaws engage each other thereby providing space therebetween for receiving said article forwardly of said press die means for compressing said article against said engaged forming jaws, to a position in which said forming jaws are spaced from each other thereby ejecting said compressed article as said press die means move past said spaced forming jaws.

2. A machine according to claim 1, said first controlling means for said press die means including control roller means connected thereto, and cam guide means arranged 9 for engagement by said roller means for moving said press die means between said holder and said carrier.

, ';;,-3';I-gA- machine'acco'rding toclairnZ, said rollen'rneans a and said cam'guide-means'being-provided with comically shaped engaging surfaces, and means foradjusting said ca'm guide means-relative to said roller rnea'nstor'varying the extent of said reciprocable movement of said press die means.-- 1 a I 'A machine accordingto claim lf said second contxiolling means including a cam, and means engaging said a cam and operatively connected to said pivot pins --for moving said forming jaws respectively into engagement with each other and to a position spaced apart from each other.

5. -A machine according to claim 4, said cam beingdisposed below said'carrier, a housing for said machine, said cam being mountedin fixed'position in said housing and relative to said cam engaging means during rotation of said pivot pinsextending from said carrier. 3-6. -A-machine according to claim 5, including motion translating means extending between-isaid'pivot pins and said camengaging means. J

- .7'. "Armachine according to claim 1, said first controlling means extending in radial directionto said drive shaft,

said second controlling means engaging said pivot pins to cause movement of said'pivot pins and hence of said jaws;

1 8. A machine according to claim 1, said first controlling means including first and second roller means, and respec tive guide means for said first and second roller means during the reciprocable movement thereof. V v 1 9. A machine for manufacturing a tampon-shaped'pa and like article; comprising a rotatable drive shaft, a

to positivelydirect said press die meansin sequential order holder fixed to saidwshaft and for rotation therewith, a 35 2,690,597

carrier spaced from said holder and operatively connected for rotation with the latter, pairs of'forming jaws shaped for engagement with'each other at respective ends thereof, pairs of spaced pivot pins extending from said holder to said carrier and spacing'the' latter from the former, said pairs of forming jaws tbeingjmounted on said respective pairs of pivot pins and extending in the space between I 'said' holder; and "said carrier," said} forming jaws being 7 adapted upon 'm'ovementiof said pivot pins toassume one position, in which said jaws arespaced ap artfrom each other and another? position in which the respective ends of said pairs vof forming jaws engage each other,rpress die means disposed for reciprocable movement within the space between a respective pair of adjacent pivot pins and thereafter beyondthe latter and said forming jaws, when ,the latter are in said spaced apart position, first means .tion in which they are spaced from each other, ejection of said compressed article by said'press die means from said spaced forming jaws may be had. 7 a a References Cited in theme of this patent UNITED STATES PATENTS 525,798 7 Richmond Sept. 11', 1894 v2,152,230 Webb Mar. 28, 1 939 2,464,310 Harwood Mar. 15,1949

Greiner et a1 Oct. 5, 1954 

